97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "protocol.h"
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SR_PRIV unsigned int get_memory_size(int type)
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{
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if (type == MEMORY_SIZE_8K)
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return 8 * 1024;
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else if (type == MEMORY_SIZE_64K)
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return 64 * 1024;
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else if (type == MEMORY_SIZE_128K)
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return 128 * 1024;
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else if (type == MEMORY_SIZE_512K)
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return 512 * 1024;
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else
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return 0;
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}
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SR_PRIV int set_limit_samples(struct dev_context *devc, uint64_t samples)
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{
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devc->limit_samples = samples;
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if (samples <= 2 * 1024)
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devc->memory_size = MEMORY_SIZE_8K;
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else if (samples <= 16 * 1024)
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devc->memory_size = MEMORY_SIZE_64K;
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else if (samples <= 32 * 1024 || devc->max_memory_size <= 32 * 1024)
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devc->memory_size = MEMORY_SIZE_128K;
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else
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devc->memory_size = MEMORY_SIZE_512K;
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sr_info("Setting memory size to %dK.",
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get_memory_size(devc->memory_size) / 1024);
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analyzer_set_memory_size(devc->memory_size);
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return SR_OK;
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}
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SR_PRIV int set_capture_ratio(struct dev_context *devc, uint64_t ratio)
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{
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if (ratio > 100) {
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sr_err("Invalid capture ratio: %" PRIu64 ".", ratio);
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return SR_ERR_ARG;
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}
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devc->capture_ratio = ratio;
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sr_info("Setting capture ratio to %d%%.", devc->capture_ratio);
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return SR_OK;
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}
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SR_PRIV void set_triggerbar(struct dev_context *devc)
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{
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unsigned int ramsize, n, triggerbar;
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ramsize = get_memory_size(devc->memory_size) / 4;
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if (devc->trigger) {
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n = ramsize;
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if (devc->max_memory_size < n)
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n = devc->max_memory_size;
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if (devc->limit_samples < n)
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n = devc->limit_samples;
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n = n * devc->capture_ratio / 100;
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if (n > ramsize - 8)
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triggerbar = ramsize - 8;
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else
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triggerbar = n;
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} else {
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triggerbar = 0;
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}
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analyzer_set_triggerbar_address(triggerbar);
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analyzer_set_ramsize_trigger_address(ramsize - triggerbar);
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sr_dbg("triggerbar_address = %d(0x%x)", triggerbar, triggerbar);
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sr_dbg("ramsize_triggerbar_address = %d(0x%x)",
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ramsize - triggerbar, ramsize - triggerbar);
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}
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